<?php

/**
 * App_Utf8::str_pad
 *
 * @author Kohana Team
 * @copyright (c) 2007 Kohana Team
 * @copyright (c) 2005 Harry Fuecks
 * @license http://www.gnu.org/licenses/old-licenses/lgpl-2.1.txt
 */
function _str_pad($str, $final_str_length, $pad_str = ' ', $pad_type = STR_PAD_RIGHT)
{
    if (App_Utf8::is_ascii($str) and App_Utf8::is_ascii($pad_str)) {
        return str_pad($str, $final_str_length, $pad_str, $pad_type);
    }
    $str_length = App_Utf8::strlen($str);
    if ($final_str_length <= 0 or $final_str_length <= $str_length) {
        return $str;
    }
    $pad_str_length = App_Utf8::strlen($pad_str);
    $pad_length = $final_str_length - $str_length;
    if ($pad_type == STR_PAD_RIGHT) {
        $repeat = ceil($pad_length / $pad_str_length);
        return App_Utf8::substr($str . str_repeat($pad_str, $repeat), 0, $final_str_length);
    }
    if ($pad_type == STR_PAD_LEFT) {
        $repeat = ceil($pad_length / $pad_str_length);
        return App_Utf8::substr(str_repeat($pad_str, $repeat), 0, floor($pad_length)) . $str;
    }
    if ($pad_type == STR_PAD_BOTH) {
        $pad_length /= 2;
        $pad_length_left = floor($pad_length);
        $pad_length_right = ceil($pad_length);
        $repeat_left = ceil($pad_length_left / $pad_str_length);
        $repeat_right = ceil($pad_length_right / $pad_str_length);
        $pad_left = App_Utf8::substr(str_repeat($pad_str, $repeat_left), 0, $pad_length_left);
        $pad_right = App_Utf8::substr(str_repeat($pad_str, $repeat_right), 0, $pad_length_left);
        return $pad_left . $str . $pad_right;
    }
    trigger_error('utf8::str_pad: Unknown padding type(' . $pad_type . ')', E_USER_ERROR);
}